[vtk-developers] Changes to vtkTubeFilter

[Will Schroeder]

Hi Folks-

vtkTubeFilter has been changed. It was in dire need of refactoring, and had 
some bad behavior (e.g., it aborted when any single polyline out of a set 
of polylines was bad). The code is now much cleaner, and will gracefully 
handle bad polylines.

Additionally I added the ability to generate texture coordinates along the 
tube. This lets you do some cool things like stripe the tube with distance, 
or use scalar values to control the marking along the tube.

I am also reworking the vtkRibbonFilter. I'll check this in once I see how 
the tubing goes.

Will